scholarly journals The Relationship Between Trunk Muscle Endurance and Three-dimensional Knee Kinematics During Jump-Landing Among Military Personnel

2020 ◽  
pp. 161-170
Author(s):  
Mohammad Fallah Mohammadi ◽  
Vahid Sobhani
Keyword(s):  
Military Personnel ◽  
Three Dimensional ◽  
Knee Kinematics ◽  
Trunk Muscle ◽  
Muscle Endurance ◽  
Jump Landing ◽  
The Relationship

Modulation of Frontal-Plane Knee Kinematics by Hip-Extensor Strength and Gluteus Maximus Recruitment During a Jump-Landing Task in Healthy Women

2013 ◽  
Vol 22 (3) ◽  
pp. 184-190 ◽  
Author(s):  
John H. Hollman ◽  
Jeffrey M. Hohl ◽  
Jordan L. Kraft ◽  
Jeffrey D. Strauss ◽  
Katie J. Traver
Keyword(s):  
Outcome Measures ◽  
Weight Bearing ◽  
Three Dimensional ◽  
Knee Kinematics ◽  
Frontal Plane ◽  
Gluteus Maximus ◽  
Neuromuscular Control ◽  
Knee Motion ◽  
Jump Landing ◽  
Hip Motion

Context:Abnormal lower extremity kinematics during dynamic activities may be influenced by impaired gluteus maximus function.Objective:To examine whether hip-extensor strength and gluteus maximus recruitment are associated with dynamic frontal-plane knee motion during a jump-landing task.Design:Exploratory study.Setting:Biomechanics laboratory.Participants:40 healthy female volunteers.Main Outcome Measures:Isometric hip-extension strength was measured bilaterally with a handheld dynamometer. Three-dimensional hip and knee kinematics and gluteus maximus electromyography data were collected bilaterally during a jumplanding test. Data were analyzed with hierarchical linear regression and partial correlation coefficients (α = .05).Results:Hip motion in the transverse plane was highly correlated with knee motion in the frontal plane (partial r = .724). After controlling for hip motion, reduced magnitudes of isometric hip-extensor strength (partial r = .470) and peak gluteus maximus recruitment (partial r = .277) were correlated with increased magnitudes of knee valgus during the jump-landing task.Conclusion:Hip-extensor strength and gluteus maximus recruitment, which represents a measure of the muscle’s neuromuscular control, are both associated with frontal-plane knee motions during a dynamic weight-bearing task.

scholarly journals Relationships Between Functional Movement Screen and Pain, Dynamic Balance, and Trunk Muscle Endurance in Military Personnel With Non-specific Chronic Low Back Pain

2020 ◽  
Vol 10 (4) ◽  
pp. 221-230
Author(s):  
Seyyed Mojtaba Soltandoost Nari ◽  
◽  
Alireza Shamsoddini ◽  
Keyword(s):  
Low Back Pain ◽  
Back Pain ◽  
Military Personnel ◽  
Chronic Low Back Pain ◽  
Dynamic Balance ◽  
Trunk Muscle ◽  
Muscle Endurance ◽  
Functional Movement Screen ◽  
Low Back ◽  
Functional Movement

Purpose: Functional disability, impaired balance, and trunk muscle endurance are among the major changes in patients with Non-specific Chronic Low Back Pain (NCLBP). Investigating the relationship between these factors and Functional Movement Screen (FMS) can facilitate effective pain management and functional problems in these patients. This study aimed to assess the relationships between FMS and pain, dynamic balance, and trunk muscle endurance in military personnel with NCLBP. Methods: The present study was of a correlational research design. The study subjects were 50 male military personnel with NCLBP (Mean±SD age=33.30±3.94 y, height= 175.32±5.50 cm, & weight=74.05±3.64 kg). FMS was evaluated by FMS tests and pain severity was assessed through Quebec Back Pain Disability Scale; the dynamic balance was evaluated by Y-Balance Test (YBT), and the trunk muscle endurance was measured by the ITO test. Statistical analysis was performed by SPSS. Pearson correlation coefficient at a significance level of P<0.05 was used to examine the association between the research variables. Results: Pain (P=0.04, r=-0.285) was negatively correlated with the FMS. The FMS was positively associated with the dynamic balance (P=0.014, r=0.346) and trunk muscle endurance (P=0.02, r=0.381). Conclusion: The FMS can be recommended as a functional assessment tools to identify functional deficits in military personnel with NCLBP. The data suggested that the researchers could employ the FMS as a useful tool in designing more effective treatment plans and improving the functional capacity of individuals with CLBP.

scholarly journals Cricket pace bowling: The trade-off between optimising knee angle for performance advantages v. injury prevention

2016 ◽  
Vol 27 (3) ◽  
pp. 76 ◽  
Author(s):  
B Olivier ◽  
AV Stewart ◽  
AC Green ◽  
W McKinon
Keyword(s):  
Three Dimensional ◽  
Knee Kinematics ◽  
Inverse Correlation ◽  
Analysis Of Covariance ◽  
Injury Incidence ◽  
Knee Angle ◽  
Kinematic Data ◽  
Student’S T ◽  
The Relationship ◽  
Accuracy Data

Background. The cricket pace bowler utilises various strategies, including a more extended front knee angle, to achieve optimal performance benefits. At times this is done to the detriment of injury  prevention.Objective. To investigate the relationship between three-dimensional (3D) knee kinematics during pace bowling action, injury incidence and bowling performance at the start and end of a cricket season.Methods. Knee angle and ball release (BR) speed of injury-free premier league (club level) cricket pace bowlers over the age of 18 years were measured at the start and end of the cricket season. Kinematic, injury- and bowling performance-related (BR speed and accuracy) data were analysed using paired and independent Student's t-tests, Pearson's correlation coefficient,χ2 test and a two-way analysis of covariance with repeated measures.Results. Thirty-one bowlers participated in this study, and kinematic data of a subset of 17 were  analysed. Nine bowlers (53%) sustained injuries during the cricket season. No statistically significant relationship was found between knee angle and injury. Bowlers who did not sustain an injury bowled with more knee flexion at the start of the season (mean (standard deviation) 157.07° (12.02°)) than at the end of it (163.95° (6.97°)) (p=0.01). There was no interaction between accuracy and knee angle. There  was a good to excellent inverse correlation between BR speed and knee angle among bowlers who  remained injury free (r=.0.79; p=0.18).Conclusion. Bowlers who remain injury free during the course of the season may use strategies other than the front knee angle to facilitate high BR speeds. Technique-related variables which are more  'protective' against injuries while allowing for higher BR speeds should be further investigated among bowlers.

Trunk–Pelvis Kinematics Variability During Gait and Its Association With Trunk Muscle Endurance in Patients With Chronic Low Back Pain

2020 ◽  
Vol 36 (2) ◽  
pp. 76-84
Author(s):  
Rasool Bagheri ◽  
Ismail Ebrahimi Takamjani ◽  
Mohammad R. Pourahmadi ◽  
Elham Jannati ◽  
Sayyed H. Fazeli ◽  
...  
Keyword(s):  
Low Back Pain ◽  
Back Pain ◽  
Chronic Low Back Pain ◽  
Trunk Muscle ◽  
Muscle Endurance ◽  
Low Back ◽  
Moderate Correlation ◽  
Significant Difference ◽  
Straight Leg Raise ◽  
The Relationship

The first purpose was to investigate the trunk muscle endurance, the second aim was to evaluate the trunk–pelvis kinematics during gait, and the third was to evaluate the relationship between trunk–pelvis kinematics and the trunk muscle endurance. Thirty participants (15 nonspecific chronic low back pain [NCLBP] and 15 healthy) were included. The authors first assessed trunk muscle endurance on endurance testing protocols. The authors next measured the trunk–pelvis kinematics during gait using a 3-dimensional motion capture system. Angular displacement, waveform pattern (CVp), and offset variability (CVo) were also examined. Statistical analysis revealed a significant difference in (1) the trunk muscle endurance and (2) sagittal, frontal, and transverse planes CVp between groups (P < .05). A significant moderate correlation was found between supine double straight-leg raise and frontal CVp (r = .521, P = .03) and transverse planes CVp (r = .442, P = .05). However, a significant moderate correlation was observed between prone double straight-leg raise and sagittal plane CVp (r = .528, P = .03) and transverse plane CVp (r = .678, P = .001). The relationship between (1) lower trunk extensor endurance with transverse and sagittal planes CVp and (2) lower abdominal muscle endurance with transverse and frontal planes CVp suggests that gait variability in these planes may result because of trunk muscle deconditioning accompanying NCLBP.

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